Subframe connector dilemma - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 28 Old 09-08-2009, 05:08 PM Thread Starter
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Subframe connector dilemma

On a casually driven and seriously underpreped autox car, will it really matter* much if I have MM standard length versus full length SFCs?

I got a suprise present that I'd like to gratefully accept

* For example, will I end up with a twisted chassis or be a lot slower due to the shorter connectors? I kinda doubt that SFC length is the rate limiting step for this car, but thought I'd ask.

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post #2 of 28 Old 09-08-2009, 06:19 PM
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From how you describe the car, it sounds like "you" won't be able to tell the difference between the two. Logic says, do it right the first time...especially when a serious amount of welding is involved.

I've had to have sub.conn's cut off before.....it wasn't fun or cost effective.

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post #3 of 28 Old 09-08-2009, 06:23 PM
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Somebody's gonna have to come up with some real numbers before I'll change my answer from "no, not a #######ed bit".
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post #4 of 28 Old 09-08-2009, 06:26 PM
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post #5 of 28 Old 09-08-2009, 10:08 PM
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I'm fabbing some subframe connectors and since I'm doing it from scratch, I just decided to make them 'full length' (mine are coming out to be 62" long). Do they provide more strength to the car? ..got me! The steel was all of $10 more to get the extra length so that's how they're going in!
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post #6 of 28 Old 09-09-2009, 10:04 AM Thread Starter
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Quote:
it sounds like "you" won't be able to tell the difference between the two
^^^ Good point

I think I'll stick with what I've been given.

Thanks.
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post #7 of 28 Old 09-09-2009, 11:13 AM
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Somebody's gonna have to come up with some real numbers before I'll change my answer from "no, not a #######ed bit".
I heard from a friend who said his left butt cheek moved 2 centimeters more in the seat when he had standard length on and when he upgraded to full length his butt cheeks were 75% stiffer.

There, some real numbers.
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post #8 of 28 Old 09-09-2009, 12:57 PM
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I have the same issue. I've got kenny brown connectors in my garage, ready to go on, but wonder if I should just get full lengths instead. the kenny browns seem to be very heavy guage, some full lengths look thinner, but at least are the full width of the frame rails. this is not the kind of part I want to swap later. But any real advantage?
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post #9 of 28 Old 09-09-2009, 01:38 PM
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I have the same issue. I've got kenny brown connectors in my garage
Those are the ones I ground off.
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post #10 of 28 Old 09-09-2009, 02:20 PM
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Those are the ones I ground off.
difference??

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post #11 of 28 Old 09-09-2009, 03:03 PM
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Can't attach a torque arm to coat hangers.
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post #12 of 28 Old 09-09-2009, 03:23 PM
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haha. fair enough. I'll sell them to a drag racer since a torque arm is the plan too
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post #13 of 28 Old 09-09-2009, 06:44 PM
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Can't attach a torque arm to coat hangers.
Maybe you can't attach it to coat hangers, but you can attach it with coat hangers.

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Yes, I love Thunderbirds. I am enlightened.
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post #14 of 28 Old 09-09-2009, 06:54 PM
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post #15 of 28 Old 09-09-2009, 11:07 PM
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Quote:
Originally Posted by Stewpid View Post
I have the same issue. I've got kenny brown connectors in my garage, ready to go on, but wonder if I should just get full lengths instead. the kenny browns seem to be very heavy guage, some full lengths look thinner, but at least are the full width of the frame rails. this is not the kind of part I want to swap later. But any real advantage?
I have the Kenny Brown's on my '89 that a previous owner installed.

My other '89 has MM full lengths.

The difference is like night and day. The KB's are worthless, it's like having nothing on there. They're coming off. . .. when I find the time and motivation.

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post #16 of 28 Old 09-10-2009, 12:54 PM
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Originally Posted by 87Fox5.0 View Post
I have the Kenny Brown's on my '89 that a previous owner installed.

My other '89 has MM full lengths.

The difference is like night and day. The KB's are worthless, it's like having nothing on there. They're coming off. . .. when I find the time and motivation.
perfect. 2 people that have used both. glad I jacked this thread. (sorry)
great info for thread poster too though
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post #17 of 28 Old 09-11-2009, 01:25 AM
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Curious if it's possible or if anyone was brave enough to install the full length SFCs with removing the interior? Or do the require cutting into the floor?
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post #18 of 28 Old 09-11-2009, 02:59 AM
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I didn't remove anything except the ECU plugs.
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post #19 of 28 Old 09-11-2009, 06:42 AM
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Good to know. Thanks
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post #20 of 28 Old 09-11-2009, 01:12 PM
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I went thru this on my recent GT, it was done by kenny brown and the previous owner used the SFC's as a jacking point. The narrow KB SFC's sitting in the center of the subframe bent the center of the subframe up. After cutting the KB's off and welding on the MM SFC's its a big difference.

Plus some of the KB installed stuff was done so poorly. I have not found one piece I have removed that doesn't look fubared. The KB PHB trunk mount had twice as many holes then needed. The KB rear control arm mounts, they missed drilled the holes like twice.

Its pretty sad a KB car is now MM car. The only part that is still KB is the roll bar (hopefully done by outsourced shop) and the license plate frame.
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post #21 of 28 Old 09-11-2009, 08:25 PM
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and the license plate frame.
ohoh. that license plate will fly down the highway like a ninja star when the frame breaks.
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post #22 of 28 Old 09-15-2009, 12:19 AM
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Has anyone had any experience with Spin-Tech subframes? I have spin-tech side exhaust and I don't think MMs will clear it. Spin-techs are suppose to fit their kits, but I don't know if it's even worth it.
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post #23 of 28 Old 09-15-2009, 07:53 AM
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I have Spintech subs. I have the old Borla/SVO side exhaust kit and they barely clear the subs. In fact I have some strips of rubber tire ziptied to the subs where the exhaust crosses under to keep them from banging against each other. It's possible that if I loosened everything it would be possible to arrange things a little better, but I'm lazy and my ghetto tire strips work OK.

I think the Spintech side exhaust exits lower, below the trim panel, so you may have more clearance with that exhaust.
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post #24 of 28 Old 09-18-2009, 12:11 AM
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How do you like them? Are they worth the money?
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post #25 of 28 Old 09-18-2009, 05:47 AM
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I have Spintech subs. I have the old Borla/SVO side exhaust kit and they barely clear the subs. In fact I have some strips of rubber tire ziptied to the subs where the exhaust crosses under to keep them from banging against each other. It's possible that if I loosened everything it would be possible to arrange things a little better, but I'm lazy and my ghetto tire strips work OK.
I remember riggin' up the same way. Split heater hose....
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post #26 of 28 Old 09-18-2009, 08:05 AM
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How do you like them? Are they worth the money?
The subs? They're fine, they do what they're intended, mostly. I'd prefer a bit more clearance, but understand that it's hard to get.

LOL Tony! I don't recall about the Spintech side exhaust--don't they use a section of Dr. Gas flattened exhaust pipe to cross the subs?
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post #27 of 28 Old 09-18-2009, 08:17 AM
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LOL Tony! I don't recall about the Spintech side exhaust--don't they use a section of Dr. Gas flattened exhaust pipe to cross the subs?
Ehhh, there is a the normal side pipe "U" coming out of the muffler and exiting under the rocker, but where the sub.connector is, it's like they put the pipe in a bench vise and created a 3" flat surface out of the round pipe to get like another 1/2" of clearance.

Wow! MY "gallery" still has some old stuff in it! If you look close(hard), you can see the rubber/red zip tie combo on the drivers side.


Last edited by 2k2GT; 09-18-2009 at 08:20 AM.
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post #28 of 28 Old 09-20-2009, 05:47 PM
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The subs? They're fine, they do what they're intended, mostly. I'd prefer a bit more clearance, but understand that it's hard to get.

LOL Tony! I don't recall about the Spintech side exhaust--don't they use a section of Dr. Gas flattened exhaust pipe to cross the subs?
I'll probably be going with those then since I have their kit already. Thanks.
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